Measuring method null of configuration property and electromagnetic property of

摘要

A system to measure geometric and electromagnetic characteristics of objects (74). Wave energy (76) of a single frequency (or very narrow band of frequencies) is directed upon an object (74) which reflects (or otherwise interacts with) the wave energy (76). The reflected wave energy (76) is sensed by many spatially spaced sensors (72) to provide electric signals (73, 75) whose amplitude and phase components are combined to give a quantity from which geometric and/or electromagnetic characteristics of the object (74) can be ascertained.